Which range best describes the umbrella code?

The umbrella code typically refers to a wide-reaching classification system used for categorizing various types of incidents or services in dispatching. In this context, the range of 20-21 is commonly associated with a collection of codes that represent specific types of emergency services or incidents, such as non-emergency calls, welfare checks, or other related services.

This range serves as a general grouping that encompasses a variety of circumstances that dispatch personnel may need to handle. It is crucial for ensuring that responders are properly dispatched according to the nature of the call. Understanding the umbrella code allows dispatchers to quickly and effectively categorize incidents, leading to improved response times and coordination among emergency services.

The other ranges represented by the other choices likely correspond to different classifications or specific types of incidents that can be more specialized or focused, which would not align with the broad application of the umbrella code.